GB1057799A - Bimetallically controlled pneumatic thermostat - Google Patents
Bimetallically controlled pneumatic thermostatInfo
- Publication number
- GB1057799A GB1057799A GB34224/65A GB3422465A GB1057799A GB 1057799 A GB1057799 A GB 1057799A GB 34224/65 A GB34224/65 A GB 34224/65A GB 3422465 A GB3422465 A GB 3422465A GB 1057799 A GB1057799 A GB 1057799A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lever
- chamber
- flapper
- pressure
- aug
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/185—Control of temperature with auxiliary non-electric power
- G05D23/1854—Control of temperature with auxiliary non-electric power with bimetallic element
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/185—Control of temperature with auxiliary non-electric power
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/2278—Pressure modulating relays or followers
- Y10T137/2409—With counter-balancing pressure feedback to the modulating device
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Control Of Fluid Pressure (AREA)
- Thermally Actuated Switches (AREA)
- Temperature-Responsive Valves (AREA)
Abstract
1,057,799. Fluid-pressure servomotor systems. ROBERTSHAW CONTROLS CO. Aug. 10, 1965 [Aug. 11, 1964 No. 34224/65. Heading G3P. In a pneumatic thermostat, a fall in the ambient temperature causes a bi-metal flapper 68 to seat against a nozzle 62, supplied via restriction 18 from a supply chamber PS, thereby causing the pressure in a chamber PP to rise and lift a diaphragm 20 to rotate a lever 42 about its pivot 52, such rotation unseating a valve 34 to admit supply pressure to a chamber PB communicating at 30 with a device for varying the ambient temperature. The increased pressure in chamber PB is communicated to a chamber PF where it acts via diaphragm 26, lever 78 and spring 86 to provide a feedback to the flapper. If the pressure in chamber PP decreases, the accompanying clockwise rotation of lever 42 unseats a valve 40 to vent chamber PB. The flapper is pivoted at 71 and a cam 76 is rotatable to vary the set point temperature via a pin 72 and lever 70. In the practical embodiment of Figs. 2-7 (not shown), a U-shaped spring 150 is located between the flapper and lever 70 and serves to ensure that the end of the flapper is always parallel to the nozzle when it engages the latter. A resilient extention 134 of the feedback lever 78 (Fig. 5) engages a clip 138 which is adjustable to vary the force exerted by the lever on the flapper.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US388823A US3302879A (en) | 1964-08-11 | 1964-08-11 | Bimetallically controlled pneumatic thermostat |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1057799A true GB1057799A (en) | 1967-02-08 |
Family
ID=23535665
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB34224/65A Expired GB1057799A (en) | 1964-08-11 | 1965-08-10 | Bimetallically controlled pneumatic thermostat |
Country Status (3)
Country | Link |
---|---|
US (1) | US3302879A (en) |
DE (2) | DE1983304U (en) |
GB (1) | GB1057799A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2189909A (en) * | 1986-04-16 | 1987-11-04 | Ti Gas Spares Ltd | Gas control valves |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3367573A (en) * | 1966-08-11 | 1968-02-06 | Robertshaw Controls Co | Miniature pneumatic thermostat |
US3908685A (en) * | 1973-10-10 | 1975-09-30 | Robertshaw Controls Co | Pneumatically operated control device and parts therefor or the like |
DE2354864C3 (en) * | 1973-11-02 | 1982-10-14 | Eckardt Ag, 7000 Stuttgart | Pressure medium-operated display device for measuring or regulating purposes |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US624046A (en) * | 1899-05-02 | johnson | ||
US680423A (en) * | 1898-08-13 | 1901-08-13 | Johnson Electric Service Company | Temperature-regulating apparatus. |
US2280345A (en) * | 1939-03-13 | 1942-04-21 | Honeywell Regulator Co | Pneumatic control |
US2285540A (en) * | 1939-07-01 | 1942-06-09 | Leeds & Northrup Co | Control system |
US2742917A (en) * | 1952-11-15 | 1956-04-24 | Foxboro Co | Pneumatically operated controller |
US2828077A (en) * | 1955-06-29 | 1958-03-25 | Honeywell Regulator Co | Pneumatic thermostat |
-
1964
- 1964-08-11 US US388823A patent/US3302879A/en not_active Expired - Lifetime
-
1965
- 1965-08-10 GB GB34224/65A patent/GB1057799A/en not_active Expired
- 1965-08-11 DE DER31170U patent/DE1983304U/en not_active Expired
- 1965-08-11 DE DE19651523371 patent/DE1523371A1/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2189909A (en) * | 1986-04-16 | 1987-11-04 | Ti Gas Spares Ltd | Gas control valves |
Also Published As
Publication number | Publication date |
---|---|
DE1523371A1 (en) | 1969-04-10 |
US3302879A (en) | 1967-02-07 |
DE1983304U (en) | 1968-04-11 |
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